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jeton csrf ;D

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thaaoblues 2024-01-05 18:28:38 +01:00
parent 3bd2bcd01a
commit 9f34926e7f
5 changed files with 385 additions and 10 deletions
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22
api.php
View file

@ -14,6 +14,9 @@
include("session_verif.php"); include("session_verif.php");
include("bdd.php"); include("bdd.php");
include('php-csrf.php');
$csrf = new CSRF();
// Get the requested URL // Get the requested URL
$request_uri = $_SERVER['REQUEST_URI']; $request_uri = $_SERVER['REQUEST_URI'];
@ -177,8 +180,16 @@
if($_SERVER['REQUEST_METHOD'] === 'POST'){ if($_SERVER['REQUEST_METHOD'] === 'POST'){
verifier_session(); verifier_session();
switch(array_pop($url_parts)){ switch(array_pop($url_parts)){
case "aj_doc": case "aj_doc":
if(!$csrf->validate($context='televersement',$_POST["jeton-csrf"])){
echo( json_encode(["status"=> "2","msg"=>"jeton csrf manquant.".$_POST["jeton-csrf"]]) );
break;
}
try{ try{
ajouter_doc($_POST); ajouter_doc($_POST);
@ -188,6 +199,11 @@
break; break;
case "valider_ensemble": case "valider_ensemble":
if(!$csrf->validate($context='valider_ensemble',$_POST["jeton-csrf"])){
echo( json_encode(["status"=> "2","msg"=>"jeton csrf manquant.".$_POST["jeton-csrf"]]) );
break;
}
try{ try{
valider_ensemble($_POST["ensemble_id"]); valider_ensemble($_POST["ensemble_id"]);
echo(json_encode(["status"=>"1","msg"=>"Ensemble validé."])); echo(json_encode(["status"=>"1","msg"=>"Ensemble validé."]));
@ -197,6 +213,12 @@
break; break;
case "supprimer_ensemble": case "supprimer_ensemble":
if(!$csrf->validate($context='supprimer_ensemble',$_POST["jeton-csrf"])){
echo( json_encode(["status"=> "2","msg"=>"jeton csrf manquant." ]) );
break;
}
try{ try{
supprimer_ensemble($_POST["ensemble_id"]); supprimer_ensemble($_POST["ensemble_id"]);
echo(json_encode(["status"=>"1","msg"=>"Ensemble supprimé."])); echo(json_encode(["status"=>"1","msg"=>"Ensemble supprimé."]));

1
index.php
View file

@ -8,6 +8,7 @@
</head> </head>
<body> <body>
<?php <?php
session_start(); session_start();
?> ?>

340
php-csrf.php Normal file
View file

@ -0,0 +1,340 @@
<?php
/**
* php-csrf v1.0.4
*
* Single PHP library file for protection over Cross-Site Request Forgery
* Easily generate and manage CSRF tokens in groups.
*
*
* MIT License
*
* Copyright (c) 2023 Grammatopoulos Athanasios-Vasileios
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
/**
* Usage:
* // Load or Start a new list of tokens
* $csrf_tokens = new CSRF(
* <modifier for the session variable and the form input name>,
* <default time before the token expire, in seconds>
* );
* // Generate an input for a form with a token
* // Tokens on the list are binded on a group so that
* // they can only be matched on that group
* // You can use as a group name the form name
* echo $csrf_tokens->input(<name of the group>);
*/
class CSRF {
private $name;
private $hashes;
private $hashTime2Live;
private $hashSize;
private $inputName;
/**
* Initialize a CSRF instance
* @param string $session_name Session name
* @param string $input_name Form name
* @param integer $hashTime2Live Default seconds hash before expiration
* @param integer $hashSize Default hash size in chars
*/
function __construct ($session_name='csrf-lib', $input_name='key-awesome', $hashTime2Live=0, $hashSize=64) {
// Session mods
$this->name = $session_name;
// Form input name
$this->inputName = $input_name;
// Default time before expire for hashes
$this->hashTime2Live = $hashTime2Live;
// Default hash size
$this->hashSize = $hashSize;
// Load hash list
$this->_load();
}
/**
* Generate a CSRF_Hash
* @param string $context Name of the form
* @param integer $time2Live Seconds before expiration
* @param integer $max_hashes Clear old context hashes if more than this number
* @return CSRF_Hash
*/
private function generateHash ($context='', $time2Live=-1, $max_hashes=5) {
// If no time2live (or invalid) use default
if ($time2Live < 0) $time2Live = $this->hashTime2Live;
// Generate new hash
$hash = new CSRF_Hash($context, $time2Live, $this->hashSize);
// Save it
array_push($this->hashes, $hash);
if ($this->clearHashes($context, $max_hashes) === 0) {
$this->_save();
}
// Return hash info
return $hash;
}
/**
* Get the hashes of a context
* @param string $context the group to clean
* @param integer $max_hashes max hashes to get
* @return array array of hashes as strings
*/
public function getHashes ($context='', $max_hashes=-1) {
$len = count($this->hashes);
$hashes = array();
// Check in the hash list
for ($i = $len - 1; $i >= 0 && $len > 0; $i--) {
if ($this->hashes[$i]->inContext($context)) {
array_push($hashes, $this->hashes[$i]->get());
$len--;
}
}
return $hashes;
}
/**
* Clear the hashes of a context
* @param string $context the group to clean
* @param integer $max_hashes ignore first x hashes
* @return integer number of deleted hashes
*/
public function clearHashes ($context='', $max_hashes=0) {
$ignore = $max_hashes;
$deleted = 0;
// Check in the hash list
for ($i = count($this->hashes) - 1; $i >= 0; $i--) {
if ($this->hashes[$i]->inContext($context) && $ignore-- <= 0) {
array_splice($this->hashes, $i, 1);
$deleted++;
}
}
if ($deleted > 0) {
$this->_save();
}
return $deleted;
}
/**
* Generate an input html element
* @param string $context Name of the form
* @param integer $time2Live Seconds before expire
* @param integer $max_hashes Clear old context hashes if more than this number
* @return integer html input element code as a string
*/
public function input ($context='', $time2Live=-1, $max_hashes=5) {
// Generate hash
$hash = $this->generateHash ($context, $time2Live, $max_hashes);
// Generate html input string
return '<input type="hidden" name="' . htmlspecialchars($this->inputName) . '" id="' . htmlspecialchars($this->inputName) . '" value="' . htmlspecialchars($hash->get()) . '"/>';
}
/**
* Generate a script html element with the hash variable
* @param string $context Name of the form
* @param string $name The name for the variable
* @param integer $time2Live Seconds before expire
* @param integer $max_hashes Clear old context hashes if more than this number
* @return integer html script element code as a string
*/
public function script ($context='', $name='', $declaration='var', $time2Live=-1, $max_hashes=5) {
// Generate hash
$hash = $this->generateHash ($context, $time2Live, $max_hashes);
// Variable name
if (strlen($name) === 0) {
$name = $this->inputName;
}
// Generate html input string
return '<script type="text/javascript">' . $declaration . ' ' . $name . ' = ' . json_encode($hash->get()) . ';</script>';
}
/**
* Generate a javascript variable with the hash
* @param string $context Name of the form
* @param string $name The name for the variable
* @param integer $time2Live Seconds before expire
* @param integer $max_hashes Clear old context hashes if more than this number
* @return integer html script element code as a string
*/
public function javascript ($context='', $name='', $declaration='var', $time2Live=-1, $max_hashes=5) {
// Generate hash
$hash = $this->generateHash ($context, $time2Live, $max_hashes);
// Variable name
if (strlen($name) === 0) {
$name = $this->inputName;
}
// Generate html input string
return $declaration . ' ' . $name . ' = ' . json_encode($hash->get()) . ';';
}
/**
* Generate a string hash
* @param string $context Name of the form
* @param integer $time2Live Seconds before expire
* @param integer $max_hashes Clear old context hashes if more than this number
* @return integer hash as a string
*/
public function string ($context='', $time2Live=-1, $max_hashes=5) {
// Generate hash
$hash = $this->generateHash ($context, $time2Live, $max_hashes);
// Generate html input string
return $hash->get();
}
/**
* Validate by context
* @param string $context Name of the form
* @return boolean Valid or not
*/
public function validate ($context='', $hash = null) {
// If hash was not given, find hash
if (is_null($hash)) {
if (isset($_POST[$this->inputName])) {
$hash = $_POST[$this->inputName];
}
else if (isset($_GET[$this->inputName])) {
$hash = $_GET[$this->inputName];
}
else {
return false;
}
}
// Check in the hash list
for ($i = count($this->hashes) - 1; $i >= 0; $i--) {
if ($this->hashes[$i]->verify($hash, $context)) {
array_splice($this->hashes, $i, 1);
return true;
}
}
return false;
}
/**
* Load hash list
*/
private function _load () {
$this->hashes = array();
// If there are hashes on the session
if (isset($_SESSION[$this->name])) {
// Load session hashes
$session_hashes = unserialize($_SESSION[$this->name]);
// Ignore expired
for ($i = count($session_hashes) - 1; $i >= 0; $i--) {
// If an expired found, the rest will be expired
if ($session_hashes[$i]->hasExpire()) {
break;
}
array_unshift($this->hashes, $session_hashes[$i]);
}
if (count($this->hashes) != count($session_hashes)) {
$this->_save();
}
}
}
/**
* Save hash list
*/
private function _save () {
$_SESSION[$this->name] = serialize($this->hashes);
}
}
class CSRF_Hash {
private $hash;
private $context;
private $expire;
/**
* [__construct description]
* @param string $context [description]
* @param integer $time2Live Number of seconds before expiration
*/
function __construct($context, $time2Live=0, $hashSize=64) {
// Save context name
$this->context = $context;
// Generate hash
$this->hash = $this->_generateHash($hashSize);
// Set expiration time
if ($time2Live > 0) {
$this->expire = time() + $time2Live;
}
else {
$this->expire = 0;
}
}
/**
* The hash function to use
* @param int $n Size in bytes
* @return string The generated hash
*/
private function _generateHash ($n) {
return bin2hex(openssl_random_pseudo_bytes($n/2));
}
/**
* Check if hash has expired
* @return boolean
*/
public function hasExpire () {
if ($this->expire === 0 || $this->expire > time()) {
return false;
}
return true;
}
/**
* Verify hash
* @return boolean
*/
public function verify ($hash, $context='') {
if (strcmp($context, $this->context) === 0 && !$this->hasExpire() && hash_equals($hash, $this->hash)) {
return true;
}
return false;
}
/**
* Check Context
* @return boolean
*/
public function inContext ($context='') {
if (strcmp($context, $this->context) === 0) {
return true;
}
return false;
}
/**
* Get hash
* @return string
*/
public function get () {
return $this->hash;
}
}

9
televerser.php
View file

@ -8,7 +8,11 @@
<body> <body>
<?php <?php
include("session_verif.php"); include("session_verif.php");
// Include the PHP-CSRF library
include('php-csrf.php');
verifier_session(); verifier_session();
$csrf = new CSRF();
?> ?>
<!-- Input to choose files --> <!-- Input to choose files -->
@ -61,7 +65,10 @@ function uploadFiles() {
i ++; i ++;
} }
// Append captured images as files to the FormData //csrf token
formData.append("jeton-csrf","<?=$csrf->string($context="televersement")?>");
// Append captured images as files to the FormData
const capturedImages = document.querySelectorAll('#selectedImages img'); const capturedImages = document.querySelectorAll('#selectedImages img');
i = 0; i = 0;

23
validation.php
View file

@ -1,8 +1,12 @@
<?php <?php
include('php-csrf.php');
session_start(); session_start();
$csrf = new CSRF();
include("session_verif.php"); include("session_verif.php");
@ -90,14 +94,15 @@ function displayDocuments() {
<?php displayDocuments(); ?> <?php displayDocuments(); ?>
<script> <script>
function valider_ensemble(ensembleId) { function valider_ensemble(ensembleId) {
const formData = new FormData();
formData.append("jeton-csrf","<?=$csrf->string($context="valider_ensemble")?>");
formData.append("ensemble_id",ensembleId);
fetch('api.php/valider_ensemble', { fetch('api.php/valider_ensemble', {
method: 'POST', method: 'POST',
headers: { body: formData,
'Content-Type': 'application/x-www-form-urlencoded',
},
body: 'ensemble_id=' + ensembleId,
}) })
.then(response => response.json()) .then(response => response.json())
.then(data => { .then(data => {
@ -114,13 +119,13 @@ function displayDocuments() {
function supprimer_ensemble(ensembleId) { function supprimer_ensemble(ensembleId) {
const formData = new FormData();
formData.append("jeton-csrf","<?=$csrf->string($context="supprimer_ensemble")?>");
formData.append("ensemble_id",ensembleId);
fetch('api.php/supprimer_ensemble', { fetch('api.php/supprimer_ensemble', {
method: 'POST', method: 'POST',
headers: { body: formData,
'Content-Type': 'application/x-www-form-urlencoded',
},
body: 'ensemble_id=' + ensembleId,
}) })
.then(response => response.json()) .then(response => response.json())
.then(data => { .then(data => {